Question

cos theta - 2cos³theta divided by 2sin³ theta - sin theta is equal to cot theta​

Answer 1

Step-by-step explanation:

(cos∅-2cos³∅)/2sin³∅-sin∅

cos(1-2cos²)/sin(2sin²-1)

cos∅(-cos2∅)/sin∅(-cos2∅)

cos∅/sin∅

cot∅

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